While the 'stable' version of Firefox remains at 3.6.3 on the main Firefox download page, it appears Mozilla is addressing ongoing concerns, not only about Firefox (and crashing on some systems) but also plug-in worries in general, (possibly even challenging Apple's outright refusal to incorporate Adobe Flash ?!).

Note: No response to numerous e-mails for comment earlier today.

Beta testers can find the new Firefox 3.6.4 Beta Build 4 for Linux, Mac OS X, and Windows in a variety of languages just posted here.